Just specify floor height and stair diameter. You'll watch the stair being built in seconds. Available settings include 5 attractive architectural styles, several post diameters and a Maximum Riser Height feature, which the program uses for calculating the best configuration to fit your project needs.

After the stair has been constructed, at the command prompt you'll see very helpful information at the design stages, such as number of risers, final riser height, height from tread 1 to tread above, and xy plane landing angle.

3D Spiral Stair is available for metric and imperial units. A graphical tutorial is available for download. With your purchase you’ll receive an interactive animation Spanish style stair sample.

Copy the 3D Spiral Stair.fas and 3D Spiral Stair menu files with the extensions: mnu, cui and cuix to your AutoCAD Support directory.

Copy the 3D Spiral Stair BLOCKS.ZIP (e.g. to a 3D Spiral Stair directory) and unzip the file. Make sure you set the desired location in the Support File Search Path. (Tools -> Options). Go to Tools - Load Application and select 3D Spiral Stair.fas.

Pull-down menu: (AutoCAD 2000 thru 2005) Type Menuload. On Menu Groups, browse and look for 3DspiralStair.mnu on your AutoCAD Support directory. (On files type choose Menu Template *.mnu). Open the file and Load. Type Yes on “Continue loading mnu file”. Go to Menu bar. Pick a position on the Menu Bar List, press Insert and then Close. The pull-down menu should appear on top of your screen. Pull-down menu: (AutoCAD 2006 thru 2009) Type Cuiload, then Browse and select 3DspiralStair.cui, then Load and Close. The pull-down menu should appear on top of your screen. Pull-down menu: (AutoCAD 2010) Type Cuiload, then Browse and select 3DspiralStair.cuix, then Load and Close. The pull-down menu should appear on top of your screen.